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Andrew Ronquillo - The Philippine Star
May 3, 2026 | 12:00am
Photo from Philippine Red Cross shows pyroclastic density currents on the south to southwestern slopes of Mayon Volcano as seen from Camalig, Albay yesterday following a lava collapse which generated rockfalls and ashfall in nearby areas.
STAR / File
MANILA, Philippines — Mayon Volcano in Albay erupted yesterday afternoon, the Philippine Institute of Volcanology and Seismology (Phivolcs) said.
The massive lava dome collapse resulted in a pyroclastic density current, or “uson,” along Mi-isi gully on the south-southwestern slope of the volcano.
“Estimated pyroclastic density current (PDC) run-out is four kilometers,” state seismologists said.
PDC is a fast-moving cloud of hot ash, gas and volcanic material that rushes down the slopes of a volcano during an eruption.
Thick dark plumes engulfed the city skies of Camalig and Guinobatan as the volcano remained restive.
For the past 24 hours, state seismologists have monitored 39 volcanic earthquakes, including 21 volcanic tremor events and 376 rockfall events from Mayon Volcano.
Phivolcs advised residents to take precautionary measures from ingesting ash from its fall.
Local government units in Albay are on standby as they monitor the situation.
Alert level three is still enforced over the volcano, and officials have prohibited entry into the six-kilometer permanent danger zone.
The Camalig Fire Station, together with residents, started cleanup operations in the town.
Meanwhile, staff of the Municipal Disaster Risk Reduction and Management Office-Guinobatan have distributed face masks to stranded people.
